DE19504613A1 - 5=ply laminated plastics pipe for carrying fluids in vehicle - Google Patents
5=ply laminated plastics pipe for carrying fluids in vehicleInfo
- Publication number
- DE19504613A1 DE19504613A1 DE19504613A DE19504613A DE19504613A1 DE 19504613 A1 DE19504613 A1 DE 19504613A1 DE 19504613 A DE19504613 A DE 19504613A DE 19504613 A DE19504613 A DE 19504613A DE 19504613 A1 DE19504613 A1 DE 19504613A1
- Authority
- DE
- Germany
- Prior art keywords
- layer
- plastic pipe
- pipe according
- molding compound
- layer plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002650 laminated plastic Substances 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 title description 3
- 239000010410 layer Substances 0.000 claims abstract description 87
- 238000000465 moulding Methods 0.000 claims abstract description 32
- 239000012790 adhesive layer Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 5
- 229920001169 thermoplastic Polymers 0.000 claims abstract 11
- 239000004604 Blowing Agent Substances 0.000 claims abstract 2
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract 2
- 239000004033 plastic Substances 0.000 claims description 24
- 229920003023 plastic Polymers 0.000 claims description 24
- 239000004952 Polyamide Substances 0.000 claims description 17
- 229920002647 polyamide Polymers 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 10
- 239000002033 PVDF binder Substances 0.000 claims description 9
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 7
- 229940126062 Compound A Drugs 0.000 claims description 6
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- JNGZXGGOCLZBFB-IVCQMTBJSA-N compound E Chemical compound N([C@@H](C)C(=O)N[C@@H]1C(N(C)C2=CC=CC=C2C(C=2C=CC=CC=2)=N1)=O)C(=O)CC1=CC(F)=CC(F)=C1 JNGZXGGOCLZBFB-IVCQMTBJSA-N 0.000 claims description 4
- LVTJOONKWUXEFR-FZRMHRINSA-N protoneodioscin Natural products O(C[C@@H](CC[C@]1(O)[C@H](C)[C@@H]2[C@]3(C)[C@H]([C@H]4[C@@H]([C@]5(C)C(=CC4)C[C@@H](O[C@@H]4[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@@H](O)[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@H](CO)O4)CC5)CC3)C[C@@H]2O1)C)[C@H]1[C@H](O)[C@H](O)[C@H](O)[C@@H](CO)O1 LVTJOONKWUXEFR-FZRMHRINSA-N 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 239000012778 molding material Substances 0.000 claims 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000009757 thermoplastic moulding Methods 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000005187 foaming Methods 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0257—Polyamide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/72—Cured, e.g. vulcanised, cross-linked
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Kunststoffrohr, dessen Wandung aus mehreren Schichten besteht. Einschichtige Kunststoffrohre aus Polyamid für den KFZ-Bau sind Stand der Technik und werden sehr vielseitig eingesetzt, z. B. für Brems-, Hydraulik-, Kraftstoff-, Kühlleitungen; siehe Deutsche Norm DIN 73 378/"Rohre aus Polyamid für Kraftfahrzeuge". Sie müssen hierbei chemisch, thermisch, mechanisch und hydraulisch unter dem im praktischen Einsatz auf tretenden Einwirkungsbedingungen betriebssicher sein, z. B. als Kraftstoffleitungen.The invention relates to a plastic tube, the wall of which consists of several layers consists. Single-layer plastic pipes made of polyamide for vehicle construction are state of the art and are used very versatile, e.g. B. for brake, hydraulic, fuel, cooling lines; see German standard DIN 73 378 / "Polyamide tubes for motor vehicles". You need to chemically, thermally, mechanically and hydraulically under the in practical use occurring conditions of operation be reliable, e.g. B. as fuel lines.
Einschichtige Rohre erfüllen unter gewissen Einsatzbedingungen die vorgesehenen Anforde rungen nur unzureichend, z. B. bei Kraftstoffen, die Methanol und/oder aromatische Kohlen wasserstoffe (z. B. Benzol) enthalten. Es kann hierbei zu Quellungen, Festigkeitsverringe rungen und Dimensionsveränderungen des Rohres kommen, sowie zu einer verstärkten Diffusion dieser Fluide, die in ihnen gefördert werden, durch die Rohrwandung und damit zu einer Belastung der Umwelt. Zunehmend verschärfte gesetzliche Vorschriften zwingen zu einer Reduzierung der Emissionen und damit speziell der Diffusionen. Single-layer pipes meet the intended requirements under certain operating conditions stanchions insufficient, z. B. in fuels containing methanol and / or aromatic coals contain hydrogen (e.g. benzene). This can lead to swelling and reduced strength Changes and dimensional changes of the pipe come, as well as an increased Diffusion of these fluids, which are conveyed in them, through the pipe wall and thus too pollution of the environment. Increasingly stricter legal regulations force one Reduction of emissions and especially of diffusions.
Parallel bestehen verschärfte Forderungen zur aktiven und passiven Sicherheit der Fahrzeuge. Im Brandfall eines Fahrzeugs bedeutet dies, für eine möglichst lange Zeitspanne sicherzustel len, daß der Kraftstoff, der sich in den Kraftstoffleitungen befindet, sich infolge eines raschen Schmelzens und Brennens ihrer Wandungen nicht entzündet.At the same time, there are stricter requirements for active and passive vehicle safety. In the event of a fire in a vehicle, this means ensuring as long as possible len that the fuel that is in the fuel lines, due to a rapid Melting and burning their walls did not ignite.
Versucht wurde deshalb, diese Nachteile einschichtiger Kunststoffrohre durch mehrschichtige Rohre für das Diffusionsverhalten (DE 35 10 395, DE 37 15 251, DE 38 21 723, DE 39 38 497, DE 40 01 125, DE 43 15 117) bzw. den Flammschutz (DE 38 17 841, DE 25 55 017, DE 21 40 806, DE 20 25 351) zu lösen. Zwar konnten Einzelerfolge für das Diffusionsverhalten (DE 43 09 829, DE 43 10 884) und den Flammschutz (DE 38 40 750) erzielt werden; eine praktikable und geschlossene Lösung der Doppelaufgabe Diffusionsverminderung und Flammschutzverbesserung steht bislang aus.Therefore, attempts were made to overcome the disadvantages of single-layer plastic pipes with multi-layer ones Pipes for the diffusion behavior (DE 35 10 395, DE 37 15 251, DE 38 21 723, DE 39 38 497, DE 40 01 125, DE 43 15 117) or flame protection (DE 38 17 841, DE 25 55 017, DE 21 40 806, DE 20 25 351) to solve. Individual successes for the Diffusion behavior (DE 43 09 829, DE 43 10 884) and flame protection (DE 38 40 750) be achieved; a practical and closed solution to the double task So far, there has been no reduction in diffusion and no improvement in flame retardancy.
Aufgabe der Erfindung ist deshalb, ein mehrschichtiges Kunststoffrohr zu schaffen, dessen Eigenschaften, z. B. als Kunststoffleitung in eingebautem Zustand im Kraftfahrzeug sind: Geringe Diffusion, hinreichender Brandschutz, gute Maßhaltigkeit, gute mechanisch-technische Belastbarkeit, gute chemische Eigenschaften, gutes Temperaturwechselverhalten, günstiger Herstellpreis. Die Lösung dieser Aufgabe führt zu einem mehrschichtigen Rohr, das folgenden Schichtaufbau von innen nach außen besitzt: Innenschicht, Haftschicht, Mittelschicht, Schäum schicht, Außenschicht.The object of the invention is therefore to provide a multilayer plastic tube, the Properties, e.g. B. as a plastic line in the installed state in the motor vehicle are: Low diffusion, adequate fire protection, good dimensional stability, good mechanical-technical Resilience, good chemical properties, good temperature change behavior, cheaper Manufacturing price. Solving this task leads to a multilayer pipe, the following Layer structure from inside to outside has: inner layer, adhesive layer, middle layer, foam layer, outer layer.
Die Ausbildung mindestens einer, vorzugsweise inneren Schicht der Formmasse aus Poly vinylidenfluorid (PVDF), verhindert die Diffusion von methanolhaltigen Kraftstoffgemischen in sehr erheblichem Umfang. Die Ausbildung mindestens einer Schäumschicht, vorzugsweise mit der Formmasse Polyamid (PA), bevorzugt vernetzt, im äußeren Wandungsbereich mit mindestens einem schaumbildenden Additiv, dessen Reaktionstemperatur höher ist als die Verarbeitungstemperatur, verbessert den Flammschutz beträchtlich. Die aufschäumende Schicht führt einerseits zu einer hohen Verarbeitungstemperatur, verbessert den Flammschutz beträchtlich. Die aufschäumende Schicht führt einerseits zu einer hohen thermischen Isolierung der die brennbaren Fluide enthaltenden inneren Schichten, mit der Folge, daß die hohe Temperatur erst nach einer vergleichsweise langen Einwirkungszeit die Innenschicht ernsthaft beeinträchtigt. Andererseits führt das Aufschäumen dazu, daß die Innenschicht besonders lange wirksam gegen Sauerstoffzutritt geschützt wird.The formation of at least one, preferably inner layer of the molding compound made of poly vinylidene fluoride (PVDF), prevents the diffusion of methanol-containing fuel mixtures to a very considerable extent. The formation of at least one foam layer, preferably with the molding compound polyamide (PA), preferably cross-linked, in the outer wall area at least one foam-forming additive, the reaction temperature of which is higher than that Processing temperature, significantly improves flame retardancy. The foaming One layer leads to a high one Processing temperature, significantly improves flame retardancy. The foaming One layer leads to a high one thermal insulation of the inner layers containing the flammable fluids, with the Consequence that the high temperature only after a comparatively long exposure time the inner layer is seriously impaired. On the other hand, the foaming leads to the fact that the inner layer is effectively protected against the ingress of oxygen for a particularly long time.
Die Schäumschicht bedarf sowohl nach innen als auch nach außen im Fall der Brandeinwirkung einer mechanischen Verstärkung bzw. nach außen zusätzlich einer feuerhemmenden Verbes serung. Nach innen wird dieses durch die Mittelschicht erreicht, vorzugsweise in der Form masse Polyamid und zur Stabilisierung vernetzt ausgebildet, die zusätzlich den Festigkeits aufbau des gesamten Rohres im normalen Einsatz gewährleistet. Nach außen wird diese Verbesserung durch die Außenschicht bewirkt, vorzugsweise in der Formmasse vernetzter Polyamide ausgebildet, die zusätzlich feuerhemmende Additive besitzt.The foam layer needs both inside and outside in the event of fire a mechanical reinforcement or an additional fire-retardant verb recovery. This is achieved internally by the middle layer, preferably in shape Mass polyamide and cross-linked to stabilize, which also strength construction of the entire pipe guaranteed in normal use. To the outside, this becomes Improvement caused by the outer layer, preferably cross-linked in the molding compound Polyamides, which also has fire retardant additives.
Der mechanische Verbund zwischen der diffusionshemmenden Innenschicht, die vorzugsweise in PVDF ausgebildet ist und dem feuerhemmenden Bereich, gebildet durch die Mittelschicht, Schäumschicht und Außenschicht, der in PA ausgebildet ist, muß durch eine besondere dünne Haftschicht sichergestellt werden. Durch ihren Kraftschluß in den Grenzflächen dieser benachbarten Schichten (Innen - zu Mittelschicht) verhindert sie deren Trennung und ist für die mechanische Stabilität der gesamten Leitung verantwortlich (z. B. bei Schwingungen oder Erschütterungen). Der Auswahl der verwendeten Formmasse oder dem Formmassengemisch für diese Haftschicht kommt demnach eine erhebliche funktionelle Bedeutung zu. Erfindungs gemäß kann sie bestehen aus polymerem Polyamid plus copolymeren Polyacrylsäureestern oder aus polymerem Polyvinylidenfluorid plus copolymeren Polymethylmethacrylaten. The mechanical bond between the diffusion-inhibiting inner layer, which is preferred is formed in PVDF and the fire-retardant area, formed by the middle layer, Foam layer and outer layer, which is formed in PA, must be through a special thin Adhesive layer can be ensured. Through their adhesion in the interfaces of these neighboring layers (inner - to middle layer) it prevents their separation and is for the mechanical stability of the entire line is responsible (e.g. for vibrations or Vibrations). The selection of the molding compound used or the molding compound mixture accordingly, this functional layer is of considerable functional importance. Invention it can consist of polymeric polyamide plus copolymeric polyacrylic acid esters or from polymeric polyvinylidene fluoride plus copolymeric polymethyl methacrylates.
Die Herstellung der mehrschichtigen Rohre erfolgt in bekannter Weise, vorzugsweise kosten günstig auf Coextrusionsanlagen. Die Vernetzung der einzelnen Formmassen kann chemisch oder durch Strahlen erfolgen. Weitere Merkmale der Erfindung ergeben sich aus den Ansprüchen.The multilayer pipes are produced in a known manner, preferably cost cheap on coextrusion lines. The crosslinking of the individual molding compounds can be chemical or by blasting. Further features of the invention result from the Claims.
In der Zeichnung zeigen im einzelnenIn the drawing show in detail
Fig. 1 Einen Längsschnitt durch ein 5-schichtiges Rohr. Fig. 1 shows a longitudinal section through a 5-layer pipe.
Fig. 2 Einen Längsschnitt durch ein 5-schichtiges Rohr mit einem aufgeschäumten Bereich in der Schäumschicht infolge von punktuellen äußeren Flammeinwirkungen. Fig. 2 shows a longitudinal section through a 5-layer pipe with a foamed area in the foam layer due to selective external effects of flame.
Mit (1) in Fig. 1 ist die Innenschicht bezeichnet; sie besteht aus der Formmasse A, vorzugswei se polymeres Polyvinylidenfluorid. Diese Schicht wirkt diffusionshemmend und ihre Schichtdicke S1 ist relativ dünn ausgebildet. Diese Innenschicht (1) wird von einer Haftschicht (2) mit der sehr geringen Schichtdicke S2 mit dem Formmassengemisch B umschlossen; diese stellt einen guten mechanischen Verbund der Innenschicht (1) zur Mittelschicht (3) dar. Deren bevorzugte Formmassengemische B bestehen vorzugsweise aus polymerem Polyvinyliden fluorid mit den copolymeren Polymethylmethacrylaten oder polymerem Polyamid mit den copolymeren Polyacrylsäureestern. Die Mittelschicht (3) besitzt eine wesentliche festigkeits mäßige Funktion für das gesamte Rohr im Normaleinsatz bzw. beim Aufschäumen der Schäumschicht (4) zur mechanischen Stabilisierung des Rohres nach innen; ihre Formmasse C besteht vorzugsweise aus vernetztem Polyamid, ihre Schichtdicke ist S3. Die Schäumschicht (4) besteht aus der Formmasse D, vorzugsweise vernetztes Polyamid und hat die Schichtdicke 54. Diese Schicht besitzt mindestens ein aufschäumendes Additiv, dessen Reaktionstempe ratur höher ist als die Verarbeitungstemperatur; bei einer entsprechenden Flamm- oder Hitzeeinwirkung kommt sie erfindungsgemäß zur Funktion und bildet dort eine Verdickung (6). Die Außenschicht (5) mit der Formmasse E, vorzugsweise aus vernetztem Polyamid, schützt die Leitung vor mechanischen äußeren Einflüssen und stabilisiert das Aufschäumen der Schicht (4) im Falle äußerer Hitzeeinwirkung; sie enthält vorzugsweise flammhemmende Additive.The inner layer is designated by ( 1 ) in FIG. 1; it consists of the molding compound A, preferably polymeric polyvinylidene fluoride. This layer has a diffusion-inhibiting effect and its layer thickness S1 is relatively thin. This inner layer ( 1 ) is enclosed with the molding compound mixture B by an adhesive layer ( 2 ) with the very small layer thickness S2; this represents a good mechanical bond between the inner layer ( 1 ) and the middle layer ( 3 ). Their preferred molding compound mixtures B preferably consist of polymeric polyvinylidene fluoride with the copolymeric polymethyl methacrylates or polymeric polyamide with the copolymeric polyacrylic acid esters. The middle layer ( 3 ) has an essential strength function for the entire tube in normal use or when foaming the foam layer ( 4 ) for mechanical stabilization of the tube to the inside; its molding compound C is preferably made of cross-linked polyamide, its layer thickness is S3. The foam layer ( 4 ) consists of the molding compound D, preferably cross-linked polyamide, and has the layer thickness 54 . This layer has at least one foaming additive, the reaction temperature is higher than the processing temperature; with a corresponding exposure to flame or heat, it comes into operation according to the invention and forms a thickening ( 6 ) there. The outer layer ( 5 ) with the molding compound E, preferably made of cross-linked polyamide, protects the line against mechanical external influences and stabilizes the foaming of the layer ( 4 ) in the event of external heat; it preferably contains flame retardant additives.
Claims (19)
die Innenschicht (1) aus einer Formmasse A eines thermoplastischen Polymers,
die Haftschicht (2) aus einem Formmassengemisch B mit einem minimal 50%-igen Masse anteil eines thermoplastischen Polymers und einem maximal 50%-igen Masseanteil thermo plastischer Copolymere,
die Mittelschicht (3) aus einer Formmasse C eines thermoplastischen Polymers, die vorzugsweise vernetzt ist,
die Schäumschicht (4) aus einer Formmasse D eines thermoplastischen Polymers, die vorzugsweise vernetzt ist und zumindest ein treibmittelhaltiges Additiv enthält, dessen Reaktionstemperatur höher ist als die Verarbeitungstemperatur,
die Außenschicht (5) aus einer Formmasse E eines thermoplastischen Polymers, die vorzugsweise vernetzt ist und zumindest ein flammhemmendes Additiv enthält.1.Multi-layer plastic pipe, dimensionally defined by its main dimensions (inner diameter Di, outer diameter Da, pipe wall thickness S), produced after the process of coextrusion, used in the automotive sector for brake, hydraulic, fuel and cooling lines, the pipe wall at least each has a load-bearing, foamable, flame-retardant, diffusion-reducing and non-positive and / or at least one combination of at least two relevant features in one layer, characterized in that the tube wall is constructed from the inside to the outside as follows:
the inner layer ( 1 ) made of a molding compound A of a thermoplastic polymer,
the adhesive layer ( 2 ) made of a molding material mixture B with a minimum 50% by weight of a thermoplastic polymer and a maximum of 50% by weight of thermoplastic copolymers,
the middle layer ( 3 ) made of a molding compound C of a thermoplastic polymer, which is preferably cross-linked,
the foam layer ( 4 ) made of a molding compound D of a thermoplastic polymer, which is preferably crosslinked and contains at least one blowing agent-containing additive, the reaction temperature of which is higher than the processing temperature,
the outer layer ( 5 ) made of a molding compound E of a thermoplastic polymer, which is preferably crosslinked and contains at least one flame-retardant additive.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19504613A DE19504613A1 (en) | 1995-02-13 | 1995-02-13 | 5=ply laminated plastics pipe for carrying fluids in vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19504613A DE19504613A1 (en) | 1995-02-13 | 1995-02-13 | 5=ply laminated plastics pipe for carrying fluids in vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19504613A1 true DE19504613A1 (en) | 1996-08-14 |
Family
ID=7753749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19504613A Withdrawn DE19504613A1 (en) | 1995-02-13 | 1995-02-13 | 5=ply laminated plastics pipe for carrying fluids in vehicle |
Country Status (1)
Country | Link |
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DE (1) | DE19504613A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19741035C1 (en) * | 1997-09-18 | 1999-03-18 | Hewing Gmbh | Sanitary or heating pipe |
DE19825932A1 (en) * | 1998-06-10 | 1999-12-16 | Dietzsch & Rothe Msr Technik O | Hose system for hydrostatic height measuring unit |
FR2825773A1 (en) | 2001-06-06 | 2002-12-13 | Ueponor Innovation Ab | MULTILAYERED PIPE AND MANUFACTURING METHOD |
-
1995
- 1995-02-13 DE DE19504613A patent/DE19504613A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19741035C1 (en) * | 1997-09-18 | 1999-03-18 | Hewing Gmbh | Sanitary or heating pipe |
DE19825932A1 (en) * | 1998-06-10 | 1999-12-16 | Dietzsch & Rothe Msr Technik O | Hose system for hydrostatic height measuring unit |
FR2825773A1 (en) | 2001-06-06 | 2002-12-13 | Ueponor Innovation Ab | MULTILAYERED PIPE AND MANUFACTURING METHOD |
US6959736B2 (en) | 2001-06-06 | 2005-11-01 | Uponor Innovation Ab | Multilayer pipe and method for manufacturing one |
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